Designing multi-party signing workflows
18 February 2026 · 7 min read · Nextarp B.V.
Many documents need more than one signature - a contract with two parties, an approval with three managers, an agreement with witnesses. Multi-party signing turns that from an email chain into a controlled, verifiable workflow.
Sequential or parallel
Sequential routing sends the document to each signer in order - useful when later signers must see earlier signatures. Parallel routing invites everyone at once and completes when all have signed - faster when order does not matter. Most real workflows mix both.
Roles and responsibilities
Define who signs, who merely approves, and who is a witness. Each role can carry a different signature level - an internal approver at AdES, an external counterparty at QES.
Keep every step verifiable
Each signature should be added as a distinct PAdES signature so the document remains valid and inspectable after every party signs - a verifier can see the full sequence, who added what, and when. Avoid flattening that history.
Notifications and expiry
- Email invitations with clear, expiring links.
- Reminders for outstanding signers.
- A deadline after which the request is void.
The finished artefact
The result is a single PDF carrying every signature, each independently verifiable, with a complete audit trail of the routing - defensible long after the deal is done.
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